take_while -> Enumerator::Lazy[permalink][rdoc][edit]take_while {|item| ... } -> Enumerator::Lazy-
Enumerable#take_while と同じですが、配列ではなくEnumerator::Lazy を返します。
例:
1.step.lazy.zip(('a'..'z').cycle).take_while { |e| e.first < 100_000 } # => #<Enumerator::Lazy: #<Enumerator::Lazy: #<Enumerator::Lazy: #<Enumerator: 1:step>>:zip(#<Enumerator: "a".."z":cycle>)>:take_while> 1.step.lazy.zip(('a'..'z').cycle).take_while { |e| e.first < 100_000 }.force.last(5) # => [[99995, "y"], [99996, "z"], [99997, "a"], [99998, "b"], [99999, "c"]][SEE_ALSO] Enumerable#take_while